Effects of degenerate orbitals on the Hubbard model
Strongly Correlated Electrons
2009-11-10 v1
Abstract
Stability of a metallic state in the two-orbital Hubbard model at half-filling is investigated. We clarify how spin and orbital fluctuations are enhanced to stabilize the formation of quasi-particles by combining dynamical mean field theory with the quantum Monte Carlo simulations. These analyses shed some light on the reason why the metallic phase is particularly stable when the intra- and inter-band Coulomb interactions are nearly equal.
Keywords
Cite
@article{arxiv.cond-mat/0303208,
title = {Effects of degenerate orbitals on the Hubbard model},
author = {Akihisa Koga and Takuma Ohashi and Yoshiki Imai and Sei-ichiro Suga and Norio Kawakami},
journal= {arXiv preprint arXiv:cond-mat/0303208},
year = {2009}
}
Comments
3 pages, To appear in JPSJ Vol. 72, No. 5 2003